CN108773976A - A kind of zero-emission multiple-stage watewater disposal system - Google Patents

Abstract

The invention discloses a kind of zero-emission multiple-stage watewater disposal systems, belong to water treatment field, it aims to solve the problem that and wastewater treatment is not thorough in the prior art, handles the problem of waste discharge rate great Yi causes secondary pollution, its key points of the technical solution are that, include wastewater equalization pond, primary purification module, intermediate water tank, double purification module and the reuse water tank being sequentially communicated by pipeline, further includes sludge treating system and purge module three times.The present invention is realized carries out multistage purification processing, thorough to purification of waste water to waste water, zero-emission, non-secondary pollution, the processing water of different sanitary grades, the advantage that has wide adaptation range, practicability high high to the reclamation rate of water resource can be obtained using a set of processing system.

Description

A kind of zero-emission multiple-stage watewater disposal system

Technical field

The present invention relates to water-treatment technology fields, more specifically, it relates to a kind of zero-emission multiple-stage watewater disposal system.

Background technology

With social continuous progress, the mankind generate a large amount of sewage in production, life.It is a large amount of due to containing in sewage Pollutant, for example pathogen contamination object, aerobic pollutant, chemical toxic pollutant, petroleum hydrocarbons, radioactive pollutant Deng, therefore the sewage without purified treatment, direct emission, huge threat can be carried out to environment, ecology and the health care belt of the mankind, is made At serious economic loss.

In the related technology, sewage is required for, by purified treatment, purified sewage being made to reach discharge standard.Existing mandate Notification number is that the Chinese patent of CN103951111B discloses a kind of sewage purification system, including the first chemicals dosing plant, second plus Medicine device, third chemicals dosing plant, coagulation tank, flocculation tank, filter device and fluid reservoir.First chemicals dosing plant and the second chemicals dosing plant It is connected to coagulation tank by pipeline；Third chemicals dosing plant is connected to by pipeline with flocculation tank；Coagulation tank passes through pipeline and flocculation Tank is connected to.Can carry out purification to sewage in short cycle by this kind of system makes water quality reach discharge standard.

But above-mentioned purification system can only be handled sewage roughly, handle high solid contaminant content, high chemistry When the industrial wastewater of pollutant load, there can be processing and be not thorough, the processing water being discharged after processing still contains a certain amount of pollution Object causes secondary pollution, is further improved.

Invention content

In view of the deficiencies of the prior art, the present invention intends to provide a kind of zero-emission Multistage wastewater processing system System with zero-emission, can carry out multistage purification processing, the thorough advantage for the treatment of and purification to sewage or industrial wastewater.

To achieve the above object, the present invention provides following technical solutions：

A kind of zero-emission multiple-stage watewater disposal system, include the wastewater equalization pond being sequentially communicated by pipeline, primary purification module, Intermediate water tank, double purification module and reuse water tank；The first return duct is communicated between the intermediate water tank and wastewater equalization pond, And first is equipped with the first control valve on return duct；Wherein primary purification module includes passing through the sequentially connected primary purifying of pipeline System, anaerobic pond, MBR biofilm treatment systems and the aerating system for being supplied oxygen for MBR biofilm treatment systems；It is described first Grade purification system includes by the flocculation basin and flotation tank of pipeline connection, for the dissolving and first for flotation tank cycle gas supply Circulating pump and the first chemicals dosing plant for from the dosing to flocculation basin；The MBR biofilm treatment systems are connected with second and add Medicine device；The double purification module includes being penetrated by the sequentially connected media filtration system of pipeline, ultrafiltration water tank and reverse osmosis Filter system；It is communicated with the second return duct between the media filtration system and wastewater equalization pond, and is equipped on the second return duct Second control valve；Further include sludge treating system, the Yi Jitong handled for the sludge to flotation tank and anaerobic pond generation It crosses pipeline and connect concentrated water for being generated to reverse osmosis filtration system with reverse osmosis filtration system and carry out the net three times of distil(l) Change module.

By using above-mentioned technical proposal, at least have the following advantages that：One, waste water passes through primary purification module, two successively Secondary purge module and three times purge module purified treatment are thorough to the purification of waste water, it can be achieved that handle the multistage purification of waste water； Two, it is flowed back by the first return duct and the second return duct, can reduce in wastewater equalization pond that solid contaminant is dense in waste water Degree, conveys conducive to waste water in pipeline；Three, it can also flow back to handle through primary purification module using the first return duct and not reach processing It is required that waste water, and then after-treatment ensure that the clean-up effect to waste water, while avoiding untreated waste water up to standard and entering Double purification module increases the purification pressure of double purification module；Four, sludge treating system can produce flotation tank and anaerobic pond Raw mud carries out pressure filtration, and solid contaminant separation post-processing in mud is relatively directly handled the mud containing a large amount of water more It is convenient；Five, the media filtration system and reverse osmosis filtration system in double purification module, can be to filtering through primary purification module Waste water further purified, filter out tiny solid suspension in water body, fine droplets pollutant, organic pollution, metal Ion chelating sediment and most microorganisms, bacterium, the waste water purified through double purification module can be used as industrial water Or domestic water is used again, and improves the reclamation rate to water resource；Six, purge module can be to osmosis filtration three times The concentrated water that system generates carries out distil(l), obtains distilled water and can be used for supplementing domestic water or industrial water, avoids anti- The problem of concentrated water direct emission that osmosis filter system generates causes secondary pollution and water resource waste；Seven, pass through above-mentioned multistage Waste water treatment system can be realized to the sufficiently cleaned up of industrial wastewater, realize zero-emission, and improve the reclamation rate to water resource.

Further, the media filtration system includes by the sequentially connected more medium filter of pipeline, activated carbon mistake Filter, cartridge filter and ultrafiltration tank group；Second return duct passes through pipeline while the water inlet end with more medium filter It is connected to water outlet；The water outlet of the ultrafiltration tank group is connected to by pipeline with ultrafiltration water tank.

By using above-mentioned technical proposal, more medium filter can filter tiny particle in water impurity；Activated carbon filtering tank Organic pollutants, coloring matter, smell substance can be adsorbed, there is further catharsis；Cartridge filter can filter out water Tiny oiliness drop, part bacterium and microorganism in body；Ultrafiltration tank is built-in with ultrafiltration membrane, can filter out grain size more than ten thousand/ One millimeter of particle, colloid.The water body filtered through media filtration system reaches the hygienic requirements of purified water, is used as living Use water.

Further, the reverse osmosis filtration system includes passing through the sequentially connected high pressure pump system of pipeline and two parallel connections Osmosis filtration tank group；Each osmosis filtration tank group includes three concatenated osmosis filtration tanks, wherein reverse osmosis It is connected with the pure water pipe for purified water to be discharged and the concentrated water pipe for filtering concentrated water to be discharged through the water outlet of filter tank；It is same anti- The concentrated water pipe for penetrating osmosis filtration tank in filter tank group is connect with the water inlet end of next stage osmosis filtration tank and afterbody The concentrated water pipe of osmosis filtration tank is connected to purge module three times；The pure water pipe of each osmosis filtration tank is and recycle-water Case is connected to；It is also associated with third chemicals dosing plant on pipeline between the ultrafiltration water tank and high pressure pump system.

It, can be expeditiously to ultrafiltration water tank stream using osmosis filtration tank group in parallel by using above-mentioned technical proposal The ultrafiltration water gone out carries out osmosis filtration, and 99% is up to the inorganic salt rejection rate in water body.High-pressure pump filtration system ensure that into Entering ultrafiltration water in osmosis filtration tank group has enough hydraulic pressure.Third chemicals dosing plant is used to add antisludging agent into water body, with Extend the service life of osmosis filtration tank group.

Further, in each osmosis filtration tank group reflux is communicated on the concentrated water pipe of afterbody osmosis filtration tank Branch pipe, the reflux branch pipe are connected to by pipeline with ultrafiltration water tank；It is mounted on third control valve on each reflux branch pipe.

By using above-mentioned technical proposal, opening third control valve can flow back the concentrated water of reverse osmosis generation, carry out secondary Osmosis filtration improves the degree of filtration to water body, reduces the discharge capacity of concentrated water.

Further, the sludge treating system includes sludge sump, filter press and mounted on connection sludge sump and press filtration Sludge pump between machine on pipeline.

By using above-mentioned technical proposal, the mud for flocculated impurities and anaerobic pond the precipitation generation that flotation tank strikes off imports Sludge sump is sent into filter press by sludge pump, after removing moisture removal through filter press press filtration, can easily be carried out to solid-state mud Processing, avoids the inconvenience to directly being handled with water slurry.

Further, the purge module three times includes concentrated water case, the single effect evaporator being connect with concentrated water case, for being single It imitates evaporator and the heating system of heat source and the cooling system for refrigerated separation distilled water is provided.

By using above-mentioned technical proposal, double purification module generate high salinity concentrated water import concentrated water case, by the road into Enter after single effect evaporator under the heat effect of heating system, moisture evaporation；The moisture of evaporation is cooled down through cooling system and is condensed, and is obtained Industrial water or domestic water can be supplemented to distilled water, further improves the reclamation rate to water resource.After evaporation and concentration Inorganic salts etc. can reduce secondary pollution caused by pollutant direct emission with otherwise processed.

Further, it is connected with off-line detection device on the reuse water tank.

By using above-mentioned technical proposal, the clean level of water body in reuse water tank can be detected, with to from reuse water tank The processing water of outflow carries out quality monitoring.

Further, between the wastewater equalization pond and primary purification module, between primary purification module and intermediate water tank, And the pump group for water delivery is both provided between intermediate water tank and double purification module, and each pump group includes two parallel connections Water pump.

By using above-mentioned technical proposal, the pump group composed in parallel by water pump can be used alternatingly two water pumps, avoid Entire processing system shuts down caused by single fault of water pump.

In conclusion the invention has the advantages that：

1, waste water passes through primary purification module, double purification module and purge module purified treatment three times successively, can to waste water into The processing of row multistage purification, purification is thorough, and can obtain the processing water for meeting different hygienic requirements using a set of processing system, real It is strong with property；

2, it is flowed back by the first return duct and the second return duct, solid contaminant in waste water can be reduced in wastewater equalization pond Concentration conveys conducive to waste water in pipeline；

3, it can also be flowed back using the first return duct and handle the waste water for not reaching processing requirement through primary purification module, carry out secondary place Reason, ensure that the clean-up effect to waste water, while avoid untreated waste water up to standard enter double purification module increase it is secondary The purification pressure of purge module；

4, the mud that sludge treating system can generate flotation tank and anaerobic pond carries out pressure filtration, to solid-state in mud is dirty It is more convenient to contaminate object separation post-processing relatively directly mud of the processing containing a large amount of water；

5, the media filtration system and reverse osmosis filtration system in double purification module, can be to filtering through primary purification module Waste water is further purified, filter out tiny solid suspension in water body, fine droplets pollutant, organic pollution, metal from Sub- chelating precipitation object and most microorganisms, bacterium, the waste water purified through double purification module reach civil water hygienic requirements, Industrial water or domestic water can be used as to be used again, improve the reclamation rate to water resource；

6, purge module can carry out distil(l) to the concentrated water that reverse osmosis filtration system generates three times, obtain distilled water to supplement Domestic water or industrial water avoid secondary pollution and water caused by the concentrated water direct emission of reverse osmosis filtration system generation The wasting of resources；

7, the multistage purification to industrial wastewater can be realized by above-mentioned multiple-stage watewater disposal system, realizes zero-emission, and improve To the reclamation rate of water resource.

Description of the drawings

Fig. 1 is the structural schematic diagram of zero-emission multiple-stage watewater disposal system in embodiment；

Fig. 2 is the structural schematic diagram of primary purification module and intermediate water tank in embodiment；

Fig. 3 is the structural schematic diagram of sludge treating system in embodiment；

Fig. 4 is the structural schematic diagram of embodiment media filtration system；

Fig. 5 is the structural schematic diagram of reverse osmosis filtration system in embodiment；

Fig. 6 is the structural schematic diagram of reuse water tank in embodiment；

Fig. 7 is the structural schematic diagram of purge module three times in embodiment.

In figure：0, wastewater equalization pond；1, primary purification module；11, primary purifying system；111, flocculation basin；1111, it stirs Device；112, flotation tank；1121, scraper plate；113, dissolving；1131, air inlet pipe；114, first circulation pumps；115, the first dosing Device；1151, sodium hydroxide dosing tank；1152, PAC dosing tanks；1153, PAM dosing tanks；12, anaerobic pond；13, MBR biomembranes Processing system；131, MBR biologies membrane cisterna；132, MBR service sinks；133, the second chemicals dosing plant；1331, sodium hypochlorite bucket；1332, Citric acid bucket；14, aerating system；141, aeration tube；142, roots blower；2, intermediate water tank；3, double purification module；31, it is situated between Matter filtration system；311, more medium filter；312, active carbon filter；313, cartridge filter；314, ultrafiltration tank group； 3141, ultrafiltration tank；32, ultrafiltration water tank；33, reverse osmosis filtration system；331, high pressure pump system；3311, high-pressure pump；3312, valve Door；332, osmosis filtration tank group；3321, pure water pipe；3322, concentrated water pipe；3323, flow back branch pipe；3324, third control valve； 3325, osmosis filtration tank；333, third chemicals dosing plant；3331, drug-feeding tube；3332, chemical feed pipe；3333, water inlet pipe；3334, Mixing tank；4, reuse water tank；41, off-line detection device；42, reuse water pump；5, the first return duct；51, the first control valve；6, Two return ducts；61, the second control valve；7, sludge treating system；71, sludge sump；72, sludge pump；73, filter press；74, mud Pipe；8, purge module three times；81, concentrated water case；82, single effect evaporator；821, evaporator；8211, concentrated water import；8212, it heats Water inlet；8213, heated water outlet；822, separator；8221, material inlet；8222, material outlet；823, condenser； 8231, cooling water inlet；8232, cooling water outlet；8233, condensation-water drain；83, heating system；831, water inlet pipe is heated； 832, outlet pipe is heated；833, heat pump circulating pump；84, cooling system；841, cooling water inlet pipe；842, cooling water outlet tube；843, Second circulation pumps；85, heat-exchangers of the plate type；851, inlet pipe；852, outlet pipe；86, water supply pipe；87, heat pump unit；9, pump group；91, Water pump.

Specific implementation mode

Below in conjunction with attached drawing, invention is further described in detail.

Embodiment：

A kind of zero-emission multiple-stage watewater disposal system, referring to Fig.1 comprising pass through the sequentially connected wastewater equalization pond of pipeline 0, one Secondary purge module 1, intermediate water tank 2, double purification module 3 and reuse water tank 4.Wherein primary purification module 1 is connected at sludge Reason system 7；Double purification module 3 includes sequentially connected media filtration system 31, ultrafiltration water tank 32 and reverse osmosis filtration system 33, reverse osmosis filtration system 33 is also associated with purge module 8 three times.It is connected with first between intermediate water tank 2 and wastewater equalization pond 0 Return duct 5 is connected with the second return duct 6 between double purification module 3 and wastewater equalization pond 0.

Referring to Fig.1, wastewater equalization pond 0 is defeated in the pipeline of aftertreatment systems for the ease of waste water for collecting waste water It send, needs to inject recirculation water into wastewater equalization pond 0 by the first return duct 5 and/or the second return duct 6 and be diluted.Reflux On the one hand the injection of water reduces the concentration of Pollutants in Wastewater and the acid-base value of waste water, conveyed conducive in pipeline；Another party Face, by injecting recirculation water so that waste water, which fills suspended impurity, can keep suspended state, reduce the aggregation in wastewater equalization pond 0 Precipitation.Waste water after the adjustment after by Pipeline transport to primary purification module 1, carry out primary purifying processing.

Referring to Figures 1 and 2, primary purification module 1 includes by the sequentially connected primary purifying system 11 of pipeline, anaerobic pond 12, MBR biofilm treatment systems 13 and the aerating system 14 for being supplied oxygen for MBR biofilm treatment systems 13.Primary purifying System 11 includes flocculation basin 111, flotation tank 112 and the first chemicals dosing plant 115 for the dosing into flocculation basin 111.Flocculation Agitating device 1111 is provided in pond 111, the first chemicals dosing plant 115 includes the sodium hydroxide dosing tank being connected to flocculation basin 111 1151, PAC dosing tanks 1152 and PAM dosing tanks 1153.Waste water adds after wastewater equalization pond 0 flows into flocculation basin 111 by first Sodium hydroxide, PAC are added into flocculation basin 111 for medicine device 115（Aluminium chloride）And PAM（Polyacrylamide）, filled in stirring Setting 1111 stirring action can be such that alkaline agent, flocculant and waste water is sufficiently mixed, and form flocculation sediment.Add in flocculation basin 111 Medicine and mixed waste water inflow flotation tank 112, by being connected with the dissolving 113 of air inlet pipe 1131 and connecting with flotation tank 112 Logical first circulation pump 114, can constantly into flotation tank 112 pumped air.In the work of the air of 114 pumping of first circulation pump Under, the flocculate precipitate generated in water body is in dispersity and floats from water body.The top open part of flotation tank 112 is set It is equipped with the scraper plate 1121 of the flocculation sediment for striking off floating.The wadding to float in flotation tank 112 can be struck off using scraper plate 1121 Retrogradation is formed sediment, and finally imports mud pipe 74.

With reference to Fig. 2, the waste water for striking off flocculate precipitate flows into anaerobic pond 12 via pipeline, in 12 opposing seal of anaerobic pond Under environment, the organic pollution in water body is decomposed by the anaerobe in anaerobic pond 12, is metabolized, is reduced in waste water Content of organics.The bottom of anaerobic pond 12 is connected with the mud pipe 74 for collecting the mud precipitated in anaerobic pond 12.

With reference to Fig. 2, the wastewater through organic matter content handled by anaerobic pond 12 has substantially reduced, and subsequently enters MBR biologies Further purified treatment is carried out in film processing system 13.MBR biofilm treatment systems 13 include MBR biologies membrane cisterna 131 and two MBR service sinks 132.MBR service sinks 132 are connected with the second chemicals dosing plant 133 and the exposure for being supplied oxygen for MBR biologies membrane cisterna 131 Gas system 14.Aerating system 14 includes aeration tube 141 and roots blower 142, can be with by roots blower 142 and aeration tube 141 Constantly oxygen is injected into MBR biologies membrane cisterna 131 so that the aerobic microbiological in MBR biologies membrane cisterna 131 can be sufficient in oxygen Under the conditions of in waste water organic matter carry out metabolic breakdown.Meanwhile it can be right in conjunction with the effect of the membrane filtration of MBR biologies membrane cisterna 131 Particulate contamination in waste water is filtered.The water body of filtration, purification flows into MBR service sinks 132, and the second chemicals dosing plant 133 includes Sodium hypochlorite bucket 1331 and citric acid bucket 1332 add sodium hypochlorite by the second chemicals dosing plant 133 into MBR service sinks 132 Water body can further be purified with citric acid.The Active Chlorine of sodium hypochlorite release can play the role of sterilizing, and On the one hand citric acid can neutralize the metal ion that another convenience of alkali in water body can be complexed in removal water body, especially a huge sum of money Belong to ion.Purified water in MBR service sinks 132 can also be back to by pipeline in MBR biologies membrane cisterna 131 to MBR biomembranes into Row cleaning.The bottom of MBR biologies membrane cisterna 131 is equally communicated with mud pipe 74, for precipitation in discharge MBR biologies membrane cisterna 131 Mud.

Referring to Figures 1 and 2, the processing water flowed out from MBR biofilm treatment systems 13 is via pump group 9 and Pipeline transport into Between water tank 2.It is again provided with by two water pumps between the water outlet of intermediate water tank 2, wastewater equalization pond 0 and primary purification module 1 91 pump groups 9 composed in parallel.First return duct 5 is connected to the water outlet of pump group 9, and is equipped with the first control on the first return duct 5 Valve 51 processed.The first control valve 51 is opened, the water in intermediate water tank 2 can be made to be back to wastewater equalization pond 0 via the first return duct 5 It is interior, to adjust the concentration and acid-base value of waste water in wastewater equalization pond 0.

Referring to Figure 1 and Figure 3, it is led from primary purifying system 11, anaerobic pond 12 and MBR biologies membrane cisterna 131 via mud pipe 74 The mud gone out is by remittance sludge sump 71.Sludge in sludge sump 71 is admitted to filter press 73 by sludge pump 72 and pipeline.Pass through 73 press filtration of filter press removes the moisture in mud so that the water content in mud substantially reduces, and facilitates and is further processed, and avoids Mud direct emission causes secondary pollution.

It is further purified into double purification module 3 by the road with Fig. 4, the water body flowed out from intermediate water tank 2 referring to Fig.1 Processing.The media filtration system 31 of double purification module 3 includes sequentially connected more medium filter 311, active carbon filter 312, cartridge filter 313 and ultrafiltration tank group 314.The pipeline of the water inlet end of more medium filter 311 and active carbon filter 312 It is divided into two-way, is used to intake into filter all the way, the water outlet of another way and filter is connected for being carried out to filter Backwash.Second control valve 61 is installed on second return duct 6, and is connected simultaneously with the water inlet end of more medium filter 311, water outlet It is logical.Open the second control valve 61 can be flowed back into wastewater equalization pond 0 by the second return duct 6 flowed out from intermediate water tank 2 just Grade purified water or the coarse filtration water filtered through more medium filter 311.

With reference to Fig. 4, water body passes through 313 mistake of more medium filter 311, active carbon filter 312 and cartridge filter successively After filter, most solid-state suspended particulates, hanging drop, coloring matter and bacterium are had been removed.Then, water body is flowed by multiple The ultrafiltration tank group 314 that ultrafiltration tank 3141 composes in parallel, is further filtered, further improves the degree of purification to water body. The ultrafiltration water flowed out from ultrafiltration tank group 314 meets the general hygienic requirements for using water, may be used as industrial water.

It flows into ultrafiltration water tank 32 with Fig. 5, ultrafiltration water referring to Fig.1 via pipeline and keeps in, it as needed can be by ultrafiltration water tank Ultrafiltration water introducing water spot or introducing reverse osmosis filtration system 33 in 32 are further filtered, further to remove water body In salinity and bacterium, further promoted to the degree of purification of water body.

With reference to Fig. 5, reverse osmosis filtration system 33 includes high pressure pump system 331, osmosis filtration tank group 332 in parallel and the Three chemicals dosing plants 333.Third chemicals dosing plant 333 include mixing tank 3334, for into mixing tank 3334 inject antisludging agent into Pencil 3331 and for into mixing tank 3334 inject reverse osmosis water water inlet pipe 3333.Mixing tank 3334 passes through 3332 He of chemical feed pipe The water inlet end of high pressure pump system 331 is connected to.The mixing in mixing tank 3334 of antisludging agent and infiltration water, after being adjusted to suitable concentration, It is added in pipe-line system via chemical feed pipe 3332.

With reference to Fig. 5, the water inlet lateral line of high pressure pump system 331 is divided into three pipelines in parallel, and each road is respectively provided with There are high-pressure pump 3311 and valve 3312.The water outlet lateral line of high pressure pump system 331 is divided into two-way, and respectively with osmosis filtration tank 332 connection of group.It can increase the hydraulic pressure into ultrafiltration water in osmosis filtration tank group 332 by high pressure pump system 331.It is reverse osmosis Filtering tank group 332 has been arranged in parallel two groups, and each group of osmosis filtration tank group 332 includes three concatenated osmosis filtration tanks 3325。

Referring to Fig.1 and Fig. 5, it is both provided with pure water pipe 3321, concentrated water pipe 3322 on each osmosis filtration tank 3325 and returns Flow branch pipe 3323.In same osmosis filtration tank group 332, the concentrated water pipe 3322 and next stage of previous stage osmosis filtration tank 3325 The water inlet end of osmosis filtration tank 3325 connects.The osmosis filtration tank of afterbody in same osmosis filtration tank group 332 3325 concentrated water pipe 3322 divides for two-way, is connected to all the way with reuse water tank 4, and another way is connected to reflux branch pipe 3323.Reflux branch Third control valve 3324 is installed, the concentrated water generated by the filtering of osmosis filtration tank group 332 can pass through reflux on pipe 3323 Branch pipe 3323 exports, and is back to by the road in ultrafiltration water tank 32, then carries out secondary osmosis filtration.

Referring to Fig.1 and Fig. 6, the water purification being obtained by filtration by reverse osmosis filtration system 33 finally import reuse water tank 4.Reuse There are two reuse water pumps 42 in parallel for connection on water tank 4, and recycle-water can be conveyed to water spot by reuse water pump 42.In order to just In the water quality of the water body in detection reuse water tank 4, off-line detection device 41 is installed on reuse water tank 4.It is filled by offline inspection Detection can be sampled to the water body in reuse water tank 4 by setting 41, to judge whether water body meets hygienic mark in reuse water tank 4 It is accurate.The waste water handled by double purification module 3 meets the sanitary standard of domestic water, can be used for supplementing domestic water.Super At water filtering tank 32 and reuse water tank 4, the different other processing water of sanitation-grade can be obtained, are used for different occasions, are realized to useless The multistage purification of water is handled, and improves the reclamation rate to water resource.

Referring to Fig.1 and Fig. 7, the concentrated water being discharged from reverse osmosis filtration system 33 contain a large amount of salt, and direct emission not only can Secondary pollution, and the waste to water resource are caused, thus also includes for carrying out three to concentrated water in the processing system of the present invention It is secondary to purify, to improve purge module 8 three times to wastewater recycle rate.Purge module 8 includes concentrated water case 81 and single effect evaporation three times The concentrated water of device 82, the high content of salt being discharged from reverse osmosis filtration system 33 imports concentrated water case 81 by the road, then enters by the road single Effect evaporator 82 is evaporated, and can obtain salt-free distilled water.

With reference to Fig. 7, single effect evaporator 82 includes evaporator 821, with the separator 822 of 821 unicom of evaporator and with detach The condenser 823 that device 822 is connected to.Concentrated water import 8211, heating water inlet 8212 and heated water outlet are provided on evaporator 821 8213.Separator 822 is detached through evaporator 821 plus thermogenetic high temperature concentrated water with steam for making.It is provided on separator 822 Material inlet 8221 and material outlet 8222 enter separator 822 from the concentrated water that concentrated water case 81 flows out from material inlet 8221, with The liquid concentrated water of separation is flowed out from material outlet 8222 together, and is back to evaporator 821 through concentrated water import 8211 by pipeline It is interior.Condenser 823 is connected to separator 822, and the steam detached from separator 822 enters condenser 823 and condenses, and forms distilled water It is discharged from condensation-water drain 8233.Condensing obtained distilled water can be directly applied or for supplementing recycle-water.From concentrated water The concentrated water that case 81 flows out is introduced into separator 822, then is discharged from the material outlet 8222 of separator 822, imports and steams via pipeline The concentrated water import 8211 for sending out device 821 is heated in evaporator 821；Concentrated water after being heated enters separation in separator 822, The steam of separation enters the condensation of condenser 823 and forms distilled water from the discharge of condensation-water drain 8233, and the liquid concentrated water of separation is through pipe Road is back in evaporator 821 and is heated again.The concentrated water import of the material outlet 8222 and evaporator 821 of separator 822 The branch for waste water to be discharged is additionally provided on pipeline between 8211.

With reference to Fig. 7, purge module 8 further includes heating system 83 and cooling system 84 three times.Heating system 83 includes and adds The heating water inlet pipe 831 that hot water inlet 8212 connects, the heating outlet pipe 832 being connect with heated water outlet 8213.Heating water inlet Heat pump circulating pump 833 is installed on pipe 831, power is provided with the flowing for hot water in heating system 83.Heat outlet pipe 832 On heat-exchangers of the plate type 85 is installed, inlet pipe 851 for leading to cold water is connected on heat-exchangers of the plate type 85 and for being discharged The outlet pipe 852 of cold water.Cooling system 84 include the cooling water inlet pipe 841 being connect with cooling water inlet 8231 on condenser 823 and The cooling water outlet tube 842 being connect with cooling water outlet 8232 on condenser 823.Second circulation is installed on cooling water inlet pipe 841 Pump 843, to provide power for flowing of the cooling water in cooling system 84.Heat water inlet pipe 831, heating outlet pipe 832, cooling The one end of water inlet pipe 841 and cooling water outlet tube 842 far from single effect evaporator 82 is connect with heat pump unit 87, collectively forms cycle System.

With reference to Fig. 7, when heating system 83 and cooling system 84 work, heating water is flowed via heating water inlet pipe 831, from adding Hot water inlet 8212 heats the concentrated water in evaporator 821 into evaporator 821；After heating, heating coolant-temperature gage reduces, warp It is discharged by heated water outlet 8213 and heating outlet pipe 832；When heat-exchangers of the plate type 85 on the heated outlet pipe of flow 832, Heat exchange occurs in heat-exchangers of the plate type 85 with the cold water flowed into from inlet pipe 851 and cools down；Heating water after cooling enters heat Pump assembly 87 after being further cooled in heat pump unit 87, enters cooling water inlet pipe 841 as cooling water；In second circulation Under the action of pump 843, cooling water enters condenser 823 via cooling water inlet pipe 841 and cooling water inlet 8231, in condenser Heat exchange occurs in 823 makes steam condense to form distilled water；It is completed in condenser 823 on the cooling water temperature after heat exchange It rises, is discharged via cooling water outlet 8232 and cooling water outlet tube 842, heated into heat pump unit 87 is interior；Through heat pump unit 87 Cooling water temperature after heating rises, and entering to heat water inlet pipe 831 as flow heated water again enters evaporator 821 as heat Source.So cycle, may be implemented the laser heating to evaporator 821 and the continuous coo1ing to condenser 823.

With reference to Fig. 7, in order to supplement the loss of moisture in heating system 83 and cooling system 84 in cyclic process, cooling water into It is both provided with water supply pipe 86 on pipe 841 and heating water inlet pipe 831.Tap water can be filled by water supply pipe 86, to supplement cycle Moisture in system so that possess enough waters in the circulatory system.

Operation principle is as follows：

It is penetrated using primary purifying system 11, anaerobic pond 12, MBR biofilm treatment systems 13, media filtration system 31 and reverse osmosis Filter system 33 carries out purified treatment to waste water, can solid impurity, organic pollution, suspended particulates, micro- life in removal/purification waste water Object, bacterium and salinity can obtain the purified water of different sanitary grades, to be used as industrial water or domestic water, realize Multistage, the purified treatment of high purification to waste water.First return duct 5, second return duct 6 and reflux branch pipe 3323 are set After-treatment after the water body reflux set, the adjusting to waste strength not only may be implemented, but also processing can be made below standard, ensures The degree of purification of wastewater treatment.The setting of sludge treating system 7 can detach water in the sludge of the generation of primary purification module 1 Point, the convenience to Treatment of Sludge is increased, secondary pollution caused by the sludge direct emission containing large quantity of moisture is avoided.Three times The setting of purge module 8, the concentrated water with high salt that can be generated to reverse osmosis filtration system 33 are evaporated purification, isolated distillation Water can be used directly, and improve the reclamation rate to waste water；Meanwhile the wastewater flow rate of discharge is handled by purge module 8 three times Greatly reduce, convenient for centralized processing or as the raw material of industry, utmostly realizes thoroughly handling, realize zero to waste water Discharge.

Above-mentioned specific embodiment is only explanation of the invention, is not limitation of the present invention, art technology Personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as It is all protected by Patent Law in scope of the presently claimed invention.

Claims (8)

1. a kind of zero-emission multiple-stage watewater disposal system, it is characterised in that：It include the wastewater equalization pond being sequentially communicated by pipeline (0), primary purification module (1), intermediate water tank (2), double purification module (3) and reuse water tank (4)；The intermediate water tank (2) It is communicated with the first return duct (5) between wastewater equalization pond (0), and the first control valve (51) is installed on the first return duct (5)；

Wherein primary purification module (1) includes by the sequentially connected primary purifying system (11) of pipeline, anaerobic pond (12), MBR Biofilm treatment system (13) and the aerating system (14) for being used to supply oxygen for MBR biofilm treatment systems (13)；The primary Purification system (11) includes by the flocculation basin (111) and flotation tank (112) of pipeline connection, for being recycled for flotation tank (112) The dissolving (113) and first circulation of gas supply pump (114) and for the first chemicals dosing plants to flocculation basin (111) interior dosing (115)；The MBR biofilm treatment systems (13) are connected with the second chemicals dosing plant (133)；

The double purification module (3) include by the sequentially connected media filtration system of pipeline (31), ultrafiltration water tank (32) and Reverse osmosis filtration system (33)；It is communicated with the second return duct between the media filtration system (31) and wastewater equalization pond (0) (6), the second control valve (61) and on the second return duct (6) is installed；

Further include for flotation tank (112) and anaerobic pond (12) generation sludge handled sludge treating system (7), with And it is distilled with the concentrated water that reverse osmosis filtration system (33) is connect for being generated to reverse osmosis filtration system (33) by pipeline The purge module three times (8) of purification.

2. a kind of zero-emission multiple-stage watewater disposal system according to claim 1, it is characterised in that：The media filtration system (31) are united including by the sequentially connected more medium filter of pipeline (311), active carbon filter (312), cartridge filter (313) and ultrafiltration tank group (314)；Second return duct (6) water inlet with more medium filter (311) simultaneously by pipeline End is connected to water outlet；The water outlet of the ultrafiltration tank group (314) is connected to by pipeline with ultrafiltration water tank (32).

3. a kind of zero-emission multiple-stage watewater disposal system according to claim 1, it is characterised in that：The osmosis filtration System (33) includes passing through the sequentially connected high pressure pump system of pipeline (331) and two osmosis filtration tank groups (332) in parallel；

Each osmosis filtration tank group (332) includes three concatenated osmosis filtration tanks (3325), wherein reverse osmosis The water outlet of filtering tank (3325) is connected with the pure water pipe (3321) for purified water to be discharged and filters the dense of concentrated water for being discharged Water pipe (3322)；The concentrated water pipe (3322) and next stage of the same interior osmosis filtration tank (3325) of osmosis filtration tank group (332) The water inlet end of osmosis filtration tank (3325) connects and the concentrated water pipe (3322) and three of afterbody osmosis filtration tank (3325) Secondary purge module (8) connection；The pure water pipe (3321) of each osmosis filtration tank (3325) connects with reuse water tank (4) It is logical；

It is also associated with third chemicals dosing plant (333) on pipeline between the ultrafiltration water tank (32) and high pressure pump system (331).

4. a kind of zero-emission multiple-stage watewater disposal system according to claim 3, it is characterised in that：Each osmosis filtration Reflux branch pipe (3323), institute are communicated on the concentrated water pipe (3322) of the interior afterbody osmosis filtration tank (3325) of tank group (332) Reflux branch pipe (3323) is stated to be connected to ultrafiltration water tank (32) by pipeline；Is mounted on each reflux branch pipe (3323) Three control valves (3324).

5. a kind of zero-emission multiple-stage watewater disposal system according to claim 1, it is characterised in that：The Treatment of Sludge system System (7) includes sludge sump (71), filter press (73) and is mounted between connection sludge sump (71) and filter press (73) on pipeline Sludge pump (72).

6. a kind of zero-emission multiple-stage watewater disposal system according to claim 1, it is characterised in that：It is described to purify mould three times Group (8) includes concentrated water case (81), is connect with concentrated water case (81) single effect evaporator (82), for being provided for single effect evaporator (82) The heating system (83) of heat source and cooling system (84) for refrigerated separation distilled water.

7. a kind of zero-emission multiple-stage watewater disposal system according to claim 1, it is characterised in that：The reuse water tank (4) off-line detection device (41) is connected on.

8. a kind of zero-emission multiple-stage watewater disposal system according to claim 1, it is characterised in that：The wastewater equalization pond (0) between primary purification module (1), between primary purification module (1) and intermediate water tank (2) and intermediate water tank (2) and two The pump group (9) for water delivery is both provided between secondary purge module (3), and each pump group (9) includes two water pumps in parallel (91)。